Experimental Study on Shear Strengthening of RC Beams with an FRP Grid-PCM Reinforcement Layer

Guo, Rui; Cai, Lianheng; Hino, Shinichi; Wang, Bo

doi:10.3390/app9152984

Cited by 16 publications

(6 citation statements)

References 45 publications

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“…The ratio of the diameter and thickness (d/t) of the TSTs varied from 600 to 3000. In this study, the scale factor λ was calculated using the ratio of the diameter of the real-world prototype and a small-scale TST (d p /d m ), or the ratio of the height level of the storage liquid in the real-world prototype and small-scale TST (hl p /hl m ), as shown in Equation (13). The selected small-scale models in the paper had a ratio of d/t around 1400, which is the average value in the API 650 standard.…”

Section: Similarity Rules For Small-scale Modelsmentioning

confidence: 99%

“…In addition, the reparation process can interrupt the business and can cause damage to storage materials during the structural renovations. Recently, the use of carbon fiber reinforced polymers (CFRPs) to strengthen concrete beams and columns has been popular because CFRPs have many advanced characteristics, such as having high strength and corrosion resistance, and being lightweight [12][13][14][15]. Moreover, the use of CFRPs to improve the load-carrying capacity and performances of steel structures has also attracted many researchers [16][17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

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Experimental Investigations of the Strengthening Effects of CFRP for Thin-Walled Storage Tanks under Dynamic Loads

2020

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In this study, the strengthening effects of different lamination conditions on carbon fiber reinforced polymers (CFRPs) for thin-walled storage tanks (TSTs) subjected to internal pressure under dynamic loads were experimentally investigated. A total of three small-scale models of TSTs were used for the investigation, including non-strengthened specimens, specimens strengthened with 0° CFRP layers, and specimens strengthened with 0°/90° CFRP layers. There were two types of tests for every specimen: the static and dynamic tests. A new experimental method using small steel balls was applied to create internal pressure in the TSTs. The results show that small steel balls could be used to increase the internal pressure compared to a normal liquid. Furthermore, the similarity rules for small-scale TSTs with small steel balls inside were also studied to consider the applicability of the models. The experimental results indicated that the CFRP layer could effectively restrain both static and dynamic hoop strains in the TSTs. Moreover, the CFRP layer could also remarkably reduce the impact of sloshing on the TST shells. The 0° CFRP layer proved to have better effects than the 0°/90° CFRP layers on the strengthening of the TSTs against dynamic loads.

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Section: Similarity Rules For Small-scale Modelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental Investigations of the Strengthening Effects of CFRP for Thin-Walled Storage Tanks under Dynamic Loads

2020

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“…Therefore, the effect of PCM shotcrete on the shear strength was insignificant and the CFRP grid sufficiently improved the shear capacity of the beam. Generally, the CFRP grids primarily contributed to improving the shear strength [30]. Cai et al [31] used CFRP grids with epoxy mortar to improve the shear behavior of RC beams.…”

Section: Introductionmentioning

confidence: 99%

Finite Element Analysis of Shear Reinforcing of Reinforced Concrete Beams with Carbon Fiber Reinforced Polymer Grid-Strengthened Engineering Cementitious Composite

et al. 2023

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This study investigates the shear behavior of reinforced concrete (RC) beams that have been strengthened using carbon fiber reinforced polymer (CFRP) grids with engineered cementitious composite (ECC) through finite element (FE) analysis. The analysis includes twelve simply supported and continuous beams strengthened with different parameters such as CFRP sheets, CFRP grid cross-sectional area, and CFRP grid size. To conduct the analysis, FE models of the RC beams were created and analyzed using ABAQUS software. Research results show that the strengthened RC beams with CFRP grids and ECC had approx. 30–50% higher shear capacity than reference RC beams. The composite action of CFRP grids with the ECCs also showed a significant ability to limit diagonal cracks and prevent the degradation of the bending stiffness of the RC beams. Furthermore, this study calculated the shear capacity of the strengthened beams using an analytical model and compared it with the numerical analysis results. The analytical equations showed only a 4% difference from the numerical results, indicating that the analytical model can be used in practice.

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“…Because the RC beams in the resistance to shear are complex, therefore many researchers have focused on studying the behavior of RC beams in the shear zone [10][11][12]. Also from the useful and new properties of basalt BFRP, many researches have focused on the use of this type of FRP in the strengthening operations, whether in the shear zone [13][14][15] or in the flexural zone [16][17][18] or both together [19] with different forms of BFRP, whether sheets or bars [20,21]. However, these experimental and numerical studies have not considered all the parameters that influence the shear behavior of RC beams strengthening with FRP sheets; such as the beam width, the effect of scale (large-scale dimensions), new types of FRP sheets (such as basalt FRP (BFRP)), and the applied strengthening configuration (Ujacketing).…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Large-scale RC Beams Shear-Strengthened with Basalt FRP Sheets

Sayed

2020

Civ Eng J

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Over the last three decades, many experimental studies have been conducted to investigate the behavior of Reinforced Concrete (RC) beams, shear strengthened with externally bonded Fiber-Reinforced Polymer (FRP) composite. However, the majority of experimental studies have focused on small- to medium-scale beam specimens. As a result, most design equations that have been developed as part of these studies may thus not be accurate at predicting the shear strength of large-scale RC beams shear-strengthened with FRP sheets. This study thus involved performing tests on six specimens to study the effect of the larger scale, along with new variables such as beam width, new varieties of FRP sheets (basalt FRP (BFRP)), and the strengthening configuration (U-jacketing), on the prediction of the ultimate load of RC beams strengthened with externally bonded FRP composite. The experimental results were analyzed and showed that all these variables affected the lateral strain along the bottom and the top of the beams. It was found that variations in the depth to width ratio of the beams caused the failure angle to vary as well. For beams strengthened with BFRP sheets, both the cracking and ultimate load increased to 1.19 and 1.94 times the cracking and ultimate load of the control beams under identical conditions.

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Experimental Study on Shear Strengthening of RC Beams with an FRP Grid-PCM Reinforcement Layer

Cited by 16 publications

References 45 publications

Experimental Investigations of the Strengthening Effects of CFRP for Thin-Walled Storage Tanks under Dynamic Loads

Experimental Investigations of the Strengthening Effects of CFRP for Thin-Walled Storage Tanks under Dynamic Loads

Finite Element Analysis of Shear Reinforcing of Reinforced Concrete Beams with Carbon Fiber Reinforced Polymer Grid-Strengthened Engineering Cementitious Composite

Experimental Study of Large-scale RC Beams Shear-Strengthened with Basalt FRP Sheets

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